Nucleation, Growth Mechanism, and Controlled Coating of ZnO ALD onto Vertically Aligned N-Doped CNTs
authors Silva, RM; Ferro, MC; Araujo, JR; Achete, CA; Cavel, G; Silva, RF; Pinna, N
nationality International
journal LANGMUIR
keywords ATOMIC LAYER DEPOSITION; X-RAY PHOTOELECTRON; CARBON NANOTUBE ARRAYS; NITROGEN; FUNCTIONALIZATION; SPECTROSCOPY; FILMS
abstract Zinc oxide thin films were deposited on vertically aligned nitrogen-doped carbon nanotubes (N-CNTs) by atomic layer deposition (ALD) from diethylzinc and water. The study demonstrates that doping CNTs with nitrogen is an effective approach for the "activation" of the CNTs surface for the ALD of metal oxides. Conformal ZnO coatings are already obtained after 50 ALD cycles, whereas at lower ALD cycles an island growth mode is observed. Moreover, the process allows for a uniform growth from the top to the bottom of the vertically aligned N-CNT arrays. X-ray photoelectron spectroscopy demonstrates that ZnO nucleation takes place at the N-containing species on the surface of the CNTs by the formation of the Zn-N bonds at the interface between the CNTs and the ZnO film.
publisher AMER CHEMICAL SOC
issn 0743-7463
year published 2016
volume 32
issue 28
beginning page 7038
ending page 7044
digital object identifier (doi) 10.1021/acs.langmuir.6b00869
web of science category Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary
subject category Chemistry; Materials Science
unique article identifier WOS:000380295300002
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journal analysis (jcr 2017):
journal impact factor 3.789
5 year journal impact factor 4.139
category normalized journal impact factor percentile 72.504
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